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Title: Estimation of groundwater velocities from Yucca Flat to the Amargosa Desert using geochemistry and environmental isotopes

Abstract

Geochemical and isotopic data from groundwater sampling locations can be used to estimate groundwater flow velocities for independent comparison to velocities calculated by other methods. The objective of this study was to calculate groundwater flow velocities using geochemistry and environmental isotopes from the southern end of Yucca Flat to the Amargosa Desert, considering mixing of different groundwater inputs from sources each and southeast of the Nevada Test Site (NTS). The approach used to accomplish the objective of this study consisted of five steps: (1) reviewing and selecting locations where carbon isotopic groundwater analyses, reliable ionic analysis, and well completion information are available; (2) calculating chemical speciation with the computer code WATEQ4F (Ball and Nordstrom, 1991) to determine the saturation state of mineral phases for each ground water location; (3) grouping wells into reasonable flowpaths and mixing scenarios from different groundwater sources; (4) using the computer code NETPATH (Plummer et al., 1991) to simulate mixing and the possible chemical reactions along the flowpath, and to calculate the changes in carbon-13/carbon-12 isotopic ratios ({delta}{sup 13}C) as a result of these reactions; and (5) using carbon-14 ({sup 14}C) data to calculate velocity.

Authors:
;  [1]
  1. Nevada Univ., Reno, NV (United States). Water Resources Center
Publication Date:
Research Org.:
Nevada Univ., Reno, NV (United States). Water Resources Center
Sponsoring Org.:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
OSTI Identifier:
515514
Report Number(s):
DOE/NV/11508-26
ON: DE97008166; TRN: 97:014867
DOE Contract Number:  
AC08-95NV11508
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; NEVADA TEST SITE; HYDROLOGY; GROUND WATER; FLOW RATE; ISOTOPE RATIO; CARBON ISOTOPES; COMPUTER CALCULATIONS; WATER WELLS; AQUIFERS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Hershey, R L, and Acheampong, S Y. Estimation of groundwater velocities from Yucca Flat to the Amargosa Desert using geochemistry and environmental isotopes. United States: N. p., 1997. Web. doi:10.2172/515514.
Hershey, R L, & Acheampong, S Y. Estimation of groundwater velocities from Yucca Flat to the Amargosa Desert using geochemistry and environmental isotopes. United States. https://doi.org/10.2172/515514
Hershey, R L, and Acheampong, S Y. 1997. "Estimation of groundwater velocities from Yucca Flat to the Amargosa Desert using geochemistry and environmental isotopes". United States. https://doi.org/10.2172/515514. https://www.osti.gov/servlets/purl/515514.
@article{osti_515514,
title = {Estimation of groundwater velocities from Yucca Flat to the Amargosa Desert using geochemistry and environmental isotopes},
author = {Hershey, R L and Acheampong, S Y},
abstractNote = {Geochemical and isotopic data from groundwater sampling locations can be used to estimate groundwater flow velocities for independent comparison to velocities calculated by other methods. The objective of this study was to calculate groundwater flow velocities using geochemistry and environmental isotopes from the southern end of Yucca Flat to the Amargosa Desert, considering mixing of different groundwater inputs from sources each and southeast of the Nevada Test Site (NTS). The approach used to accomplish the objective of this study consisted of five steps: (1) reviewing and selecting locations where carbon isotopic groundwater analyses, reliable ionic analysis, and well completion information are available; (2) calculating chemical speciation with the computer code WATEQ4F (Ball and Nordstrom, 1991) to determine the saturation state of mineral phases for each ground water location; (3) grouping wells into reasonable flowpaths and mixing scenarios from different groundwater sources; (4) using the computer code NETPATH (Plummer et al., 1991) to simulate mixing and the possible chemical reactions along the flowpath, and to calculate the changes in carbon-13/carbon-12 isotopic ratios ({delta}{sup 13}C) as a result of these reactions; and (5) using carbon-14 ({sup 14}C) data to calculate velocity.},
doi = {10.2172/515514},
url = {https://www.osti.gov/biblio/515514}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}